Results 31 to 40 of about 3,105 (240)
Time variations of the ionosphere at the northern tropical crest of ionization at Phu Thuy, Vietnam [PDF]
Annales Geophysicae, 2011 This study is the first which gives the climatology of the ionosphere at the northern tropical crest of ionization in the Asian sector. We use the data from Phu Thuy station, in Vietnam, through three solar cycles (20, 21 and 22), showing the complete
H. Pham Thi Thu +3 more
doaj +1 more source
Comparison of latitude distribution and evolution of even and odd sunspot cycles [PDF]
, 2020 We study the latitudinal distribution and evolution of sunspot areas of Solar Cycles 12 – 23 (SC12–23) and sunspot groups of Solar Cycles 8 – 23 (SC8–23) for even and odd cycles.
Takalo, J. (Jouni), Takalo, Jouni
core +1 more source
Economic Theory, 2003 This paper shows new properties about the equilibria of a stationary OG economy by establishing a connection between its stationary equilibria and those of a finite economy, with and without extrinsic uncertainty. Specifically, it shows the countability and local uniqueness with respect to the sup metric of the so-called sunspot cycles introduced here,
openaire +3 more sources
Principal component analysis of sunspot cycle shape [PDF]
, 2018 Aims. We study the shape of sunspot cycles using the Wolf sunspot numbers and group sunspot numbers of solar cycles 1–23. We determine the most typical “model” cycles and the most asymmetric cycles, and test the validity of the two Waldmeier rules: the ...
Takalo, J. (Jouni) +5 more
core +1 more source
Prediction of sunspot and plage coverage for solar cycle 25 [PDF]
, 2021 Solar variability occurs over a broad range of spatial and temporal scales, from the Sun's brightening over its lifetime to the fluctuations commonly associated with magnetic activity over minutes to years.
Penza, Valentina +9 more
core +1 more source
PROGNOSES AND ANOMALY OF 24TH CYCLE OF SOLAR ACTIVITY
Odessa Astronomical Publications, 2014 Development of solar activity in 24th cycle has specific peculiarity – non-monotonous increasing of solar activity on grown phase which occurs for 1/3 number of all cycles.
V. G. Lozitsky, V. M. Efimenko
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2023 Sunspot records reveal that whilst the Sun has an approximately 11 year cycle of activity, no two cycles are of the same duration. Since this activity is a direct driver of space weather at Earth, this presents an operational challenge to quantifying ...
S. C. Chapman, S. C. Chapman
doaj +1 more source
Does Correction Factor Vary with Solar Cycle? [PDF]
Journal of Astronomy and Space Sciences, 2012 Monitoring sunspots consistently is the most basic step required to study various aspects of solar activity. To achieve this goal, the observers must regularly calculate their own correction factor k and keep it stable. Relatively recently, two observing
Heon-Young Chang, Sung-Jin Oh
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Modulation of the sunspot cycle [PDF]
Astronomy & Geophysics, 2010 Solar activity has been abnormally high for the last half-century, but the extremely feeble start of the latest 11-year cycle suggests that this episode is probably coming to an end. This prospect raises some fascinating and important issues, involving an extremely wide range of timescales, writes Nigel Weiss.
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Advanced Science, EarlyView.This study reveals a citrate–ACLY–H3K27ac metabolic–epigenetic axis driving inflammatory gene activation and kidney fibrosis, highlighting ACLY inhibition as a potential therapeutic strategy for chronic kidney disease (CKD). ABSTRACT The mechanisms by which metabolic stress drives epigenetic dysregulation and fibrosis in chronic kidney disease (CKD ...
Chunxiu Du +15 more
wiley +1 more source